API Standard Special Features Drill Collar and Non-Magnetic Drill Collar Nmdc

• After-sales Service: 1 Year
• Warranty: 1 Year
• Manufacturing Process: Forging
• Surface Treatment: Spray-Paint
• Operation Pressure: Atmospheric Pressure
• Material: Cast Steel
• Model NO.: drill collar
• Od in: 10-4 1/8
• Hardbanding Material: Customer Made
• Spiral Grooved Drill Collar: Uaual Size
• Brand: Tianhe Oil
• Transport Package: Wooden Box
• Specification: see the detail specification
• Trademark: Tianheoil
• Origin: China
• HS Code: 7318160000
• Production Capacity: 50000

Product Description

Product Description

Spiral Grooving In order to reduce differential pressure sticking, the surface of drill collars can be spiral-grooved.
 

Product Parameters

Spiral Grooved Drill Collars: Usual Sizes
OD	4 3/4"     6 1/4"     6 3/4"      7 1/4"     7 1/2"       8"      9 1/2"     10"       11"
Depth of cut (in)	7/32 ±1/32	9/32 ±1/16	5/16 ±1/16	11/32 ±1/16	11/32     3/8 ±1/16   ±1/16		13/32    7/16 ±3/12   ±3/32		15/32 ±3/32
Spiral pitch (in)	38 ±1	42 ±1	46 ±1	64 ±1	64 ±1	68 ±1	72 ±1	76 ±1	80 ±1

Note 1-Loss of weight is approximatively 4%, compared to slick drill collars.

Note 2-Length of spiraled section allows reconditionning of connections.
 

 

Stress Relief Groove & Bore Back Box
Stress relief grooves improve bending strength of pin and box connections and, therefore, durability. Stress relief grooves for box and pin are defined by API.
Bore back box is a gradual reduction of internal diameter by gradually increasing material cross sectional area at critical section. This will ultimately drastically reduce stress concentration during static
/ dynamic loading and prevents box connections from failure.

Hardbanding
We  provide several hardbanding materials  for
customer's choice: Arnco-100XT, Arnco-300XT, TCS-8000;

 

Slip and Elevator Recess
Slip and elevator recesses improve downhole handling efficiency and safety. Slip and elevator recesses are machined in accordance with API 7-1.
 

Detailed Photos

 

 

Company Profile

Tianhe Oil Group Huifeng Petroleum Equipment Co., Ltd is a modernized medium-scale enterprise specialized in production of oil and gas tools.

As an API-Certified established manufacturer and supplier of a comprehensive range of downhole equipment with related accessories, we are committed to providing the highest Quality products for the Petroleum and natural gas industry since 1973.

Tianhe Oil Group strongly believes and promotes Total Quality Management, implement the ISO quality management system and HSE management system and API Standard, which has been deeply implanted into every person's thought and carried out into every aspect of work.

So far, Tianhe Oil Group has established strong business relationships with over 200 international oil & gas companies in supporting the top 50 oil producing countries.

We take pride in delivering superior performances and reliability. Our objective is to exceed your expectations, improve your economics and be an integral part of your strategies.


 

Certifications

Packaging & Shipping

All the packing will be suitable for export packing. All precautions will be taken to protect the cases from damage during overseas transportation,so as to receive them under proper conditions at the final destination.


 

FAQ

1) How can I place order?

A: You can contact us by email about your order details, or place order on line.

2) How can I pay you?

A: After you confirm our PI, we will request you to pay. T/T or L/C detc payment terms are acceptable.

3) What's the order procedure?

A: First we discuss order details, production details by email or TM. Then we issue you an PI for your confirmation. You will be requested to do pr -epaid  payment or deposit before we go into production. After we get the deposit, we start to process the order.  Before production has been finished, we will contact you for shipment details, and the balance payment. After payment has been settled, we start to prepare the shipment for you.